if something unpleasant or difficult looms, it seems likely to happen soon.
本身是“以庞然大物的形状出现在面前”，内涵有“出现在人们心中，既重大又令人惊恐不安”。
可表现“迫在眉睫”“一触即发”，主语一般为有负面含义的词，如“crisis”“problems”“threat”“danger”等。
Another financial crisis is looming.
loom+large搭配使用，表示“（问题、忧虑、威胁等）挥之不去，萦绕心中”，“心病”，一想起来就让人紧张担心的事情。
The Gaokao, China's college entrance exam, looms large in the life of almost every Chinese student.
作业：
1。As artificial intelligence developing, worries loom.
2. City development looms potential problems for antiquity protection.